回複：回複：AP寄錯地址了，多長時間能被退回啊

That mistake probably happens frequently. It probably will slow down your application.

Their solution could be to forward it where it belongs. If not, they'll reject it and return it to you. If you paid the fee and your check is cashed, your case will be OK.

So, you may just wait for a while. Then, check with your bank (if you paid the fee). If your check isn't cashed or you did not pay the fee, you may call USCIS to see what happened after a couple of weeks. If they do not find your case in the system, you just file a new one again.